Monitor System Resources in Ubuntu 12.04 LTS

This tutorial shows how to monitor your Ubuntu system resources such as usage of processor, memory, network, hard disk and also cpu/motherboard temperature, cpu fan speed.
There’s a good system load indicator for Ubuntu monitoring cpu usage, cache, memory, network, etc. And psensor is a gtk+ application monitoring temperatures and fan speeds.

1. Install system load indicator

Open up a terminal (Ctrl+Alt+T) and install it from ppa:indicator-multiload/stable-daily. You can use graphical way adding ppa

sudo add-apt-repository ppa:indicator-multiload/stable-daily
sudo apt-get update
sudo apt-get install indicator-multiload

 
2. Install psensor to monitor temperatures and fan speeds

First install lm-sensor, and start detect hardware sensors:

sudo apt-get install lm-sensors sudo sensors-detect

Install Psensor from this ppa:jfi/ppa

sudo apt-add-repository ppa:jfi/ppa
sudo apt-get update
sudo apt-get install psensor

 
3. Launch startup applications from the dash, add the two indicator as auto-start at login.
in command area:

• system load monitor use indicator-multiload
• psensor use psensor